ESR1 and breast cancer: Similarly, a study in Ahmedabad, India, showed a 56.9% positive ER status and a 35.5% PgR positive status [10]. Singh et al. reported ER positivity in 44.6% cases and PgR positivity in 40.4% cases [2]. Hathila et al. reported 53.3% of breast cancer patients positive for ER and 36.6% of patients positive for PgR [15].